28287354537 has 12 divisors (see below), whose sum is σ = 44002551684. Its totient is φ = 17407602720.

The previous prime is 28287354461. The next prime is 28287354553. The reversal of 28287354537 is 73545378282.

28287354537 is a `hidden beast` number, since 2 + 8 + 28 + 73 + 545 + 3 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18267144336 + 10020210201 = 135156^2 + 100101^2 .

It is not a de Polignac number, because 28287354537 - 2²² = 28283160233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28287354437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120886014 + ... + 120886247.

It is an arithmetic number, because the mean of its divisors is an integer number (3666879307).

Almost surely, 2^28287354537 is an apocalyptic number.

It is an amenable number.

28287354537 is a deficient number, since it is larger than the sum of its proper divisors (15715197147).

28287354537 is a wasteful number, since it uses less digits than its factorization.

28287354537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241772280 (or 241772277 counting only the distinct ones).

The product of its digits is 11289600, while the sum is 54.

The spelling of 28287354537 in words is "twenty-eight billion, two hundred eighty-seven million, three hundred fifty-four thousand, five hundred thirty-seven".